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Posted by Schu (more from Schu) on Mon, 19 Nov 2001 07:49:32
In Reply to: Same efficiency, same dB regardless of impedance, MitchN, Sat, 17 Nov 2001 01:10:40
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Impedence does vary with frequency which is why they give a nominal impedence. Most people can measure it. I used to do "impedence matching" sometimes when I built speakers when they had a strange anomoly in the curve. That's a story for another day.
An amplifier, normally the better ones, will deliver more power to a lower impedence. An amplifier rated to deliver a certain amount of power to an 8 Ohm load should deliver more to a 4 Ohm load. The quality of the power can lose some of its dynamics and finesse if it's not rated to handle the lower impedence loads. I'm guessing that the Saab amplifier is high quality for a car, but still lesser quality. I haven't hear of anybody blowing up the amp from putting in 4 Ohm speakers so it's probably fine.
The point? The amplifier will put out more power to a speaker with lower impedence. This may not be noticeable as MitchN pointed out if either of the impedence curves are atypical.
Bill
posted by 64.3.1...
Posts in this Thread:
- Front dash speakers / impediance, Julian Johnston, Thu, 15 Nov 2001 23:48:58
- Same efficiency, same dB regardless of impedance, MitchN, Sat, 17 Nov 2001 01:10:40
- More, Schu, Mon, 19 Nov 2001 07:49:32 <-- Viewing This Message
- infinities will be 3db LOUDER, GM, Fri, 16 Nov 2001 23:52:03
- Re: Front dash speakers / impediance, Julian Johnston, Fri, 16 Nov 2001 16:34:19
- Re: Front dash speakers / impediance, robin
, Fri, 16 Nov 2001 11:55:58 - sound output will be lower by 3dB. n/m, StanleyB, Fri, 16 Nov 2001 04:19:49
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